EP 0405099 A2 19910102 - Method and apparatus for providing error correction to symbol level codes.
Title (en)
Method and apparatus for providing error correction to symbol level codes.
Title (de)
Verfahren und Gerät mit Block-Kode-kodierter Fehlerkorrektur.
Title (fr)
Méthode et appareil pour établir la correction d'erreurs de codes en bloc.
Publication
Application
Priority
US 37093589 A 19890623
Abstract (en)
An error correction coding system employs a single check symbol from an arbitrary sequence of information symbols to provide single error correction at the symbol level. The sequence of information symbols may in fact also be arbitrarily long. The coding system of the present invention provides both a method and apparatus for encoding the check symbol and a method and apparatus for error correction based upon the single coded symbol character. The system is particularly applicable for use in conjunction with bar code recognition systems but is in fact applicable to a broad range of coding systems, including optical character recognition and ordinary alphanumeric codes.
IPC 1-7
IPC 8 full level
G06F 11/10 (2006.01); G06K 7/10 (2006.01); G06K 19/14 (2006.01); H03M 13/00 (2006.01); H03M 13/07 (2006.01)
CPC (source: EP US)
G06K 19/14 (2013.01 - EP US); H03M 13/07 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0405099 A2 19910102; EP 0405099 A3 19931222; EP 0405099 B1 19970102; CA 2013386 A1 19901223; CA 2013386 C 19940329; DE 69029539 D1 19970213; DE 69029539 T2 19970717; JP 2567973 B2 19961225; JP H0331980 A 19910212; US 5070504 A 19911203
DOCDB simple family (application)
EP 90108765 A 19900510; CA 2013386 A 19900329; DE 69029539 T 19900510; JP 16006890 A 19900620; US 37093589 A 19890623